Every thing and institution we see around us, created by human agency, had first to exist as a thought in some human mind. Thought therefore is constructive. Human thought is the spiritual power of the cosmos operating through its creature man. "The Master Key" instructs the reader how to use that power, and use it both constructively and creatively. The things and conditions we desire to become realities we must first create in thought. "The Master Key" explains and guides the process.

"The Master Key" teaching has hitherto been published in the form of a Correspondence Course of 24 lessons, delivered to students one per week for 24 weeks. The reader, who now receives the whole 24 parts at one times, is warned not to attempt to read the book like a novel, but to treat it as a course of study and conscientiously to imbibe the meaning of each part - reading and re-reading one part only per week before proceeding to the next. Otherwise the later parts will tend to be misunderstood and the reader's time will be wasted.

"The Master Key" will make of the reader a greater, better personality, and equipped with a new power to achieve any worthy personal purpose and a new ability to enjoy life's beauty and wonder.